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  1. Planetary Science

    Enceladus: Small but feisty

    Close-up observations of Saturn's tiny moon Enceladus reveal that its south pole is hotter than its equator and that the icy satellite continues to undergo eruptions.

    By Ron Cowen
  2. Health & Medicine

    Stroke site is often not right

    Thousands of strokes in the right half of the brain may go unrecognized because their symptoms are less distinctive than those of left-side strokes.

    By Ben Harder
  3. Health & Medicine

    Targeted Attack

    Scientists are piecing together the details of how mutations in a protein called EGFR can lead to cancer, and they are designing a new class of drugs to stop the protein's destructive behavior.